There have been a few times in my life where I wondered what it would have been like to have children. I like kids, and they usually like me, but I never really had a desire to have one and now that I'm in my mid 30's I've pretty much written the idea off.
I love my life, and I love the freedom not having kids gives me over most of my friends that do have kids. Most of my friends don't care about it, and I don't give them shit for having kids or anything stupid like that. Occasionally I'll catch some salt from a friend who I can clearly tell is jealous that I was able to go home and binge a new show in 2 days, or that I went to the bar after work. This usually comes in the form of something like a snarky comment about how happy they are with their kids. I usually ignore it, it's not a big deal.
I also notice I have a lot less stress in my life than pretty much all of my friends haha. Kids may be great, but they bring a boat load of life stress down on you!